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Logical Database Design

Logical Database Design
A foreign key may be null and still adhere to the referential integrity constraint.

True
False

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Logical Database Design
Normalization is a formal process for deciding which attributes should be grouped together in a relation.

True
False

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Logical Database Design
A null value is assigned when no other value applies.

False
True

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Logical Database Design
The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities.

True
False

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Logical Database Design
A primary key may be null.

True
False

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Logical Database Design
A relation has which of the following properties?

Attributes can have the same name within a given table.
The order of the columns is significant.
Each relation has a unique name.
Each row is not unique.

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